Subtract 5/20 from 12/9
1st number: 1 3/9, 2nd number: 5/20
12/9 - 5/20 is 13/12.
Steps for subtracting fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 9 and 20 is 180
Next, find the equivalent fraction of both fractional numbers with denominator 180 - For the 1st fraction, since 9 × 20 = 180,
12/9 = 12 × 20/9 × 20 = 240/180 - Likewise, for the 2nd fraction, since 20 × 9 = 180,
5/20 = 5 × 9/20 × 9 = 45/180 - Subtract the two like fractions:
240/180 - 45/180 = 240 - 45/180 = 195/180 - After reducing the fraction, the answer is 13/12
- In mixed form: 11/12
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 24/9-5/20 12/9-10/20 12/18-5/20 12/9-5/40 36/9-5/20 12/9-15/20 12/27-5/20 12/9-5/60 60/9-5/20 12/9-25/20 12/45-5/20 84/9-5/20 12/9-35/20 12/63-5/20